It's not quite that bad here, but I've seen unicyclists juggling while riding to class, a middle-aged man riding a razor scooter with a dinosaur head mounted on the handle bars, people going down hills in wheeled trash cans, people walking around with 5 foot wooden swords for no apparent reason, etc. That said, I would guess that people walking around a campus square are probably not paying lots of attention to their surroundings since it's not that dangerous. Such places are typically pedestrian only and fairly secure, so being run over by a car/eaten by wild animals/attacked by terrorists isn't really a concern.